chore: import upstream snapshot with attribution

server/functions/text.go

@@ -0,0 +1,131 @@
+// Copyright 2024 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package functions
+
+import (
+	"github.com/dolthub/go-mysql-server/sql"
+
+	"github.com/dolthub/doltgresql/server/functions/framework"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+	"github.com/dolthub/doltgresql/utils"
+)
+
+// initText registers the functions to the catalog.
+func initText() {
+	framework.RegisterFunction(textin)
+	framework.RegisterFunction(textout)
+	framework.RegisterFunction(textrecv)
+	framework.RegisterFunction(textsend)
+	framework.RegisterFunction(bttextcmp)
+	framework.RegisterFunction(bttextnamecmp)
+}
+
+// textin represents the PostgreSQL function of text type IO input.
+var textin = framework.Function1{
+	Name:       "textin",
+	Return:     pgtypes.Text,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Cstring},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		return val.(string), nil
+	},
+}
+
+// textout represents the PostgreSQL function of text type IO output.
+var textout = framework.Function1{
+	Name:       "textout",
+	Return:     pgtypes.Cstring,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Text},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		return val, nil
+	},
+}
+
+// textrecv represents the PostgreSQL function of text type IO receive.
+var textrecv = framework.Function1{
+	Name:       "textrecv",
+	Return:     pgtypes.Text,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Internal},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		data := val.([]byte)
+		if data == nil {
+			return nil, nil
+		}
+		return string(data), nil
+	},
+}
+
+// textsend represents the PostgreSQL function of text type IO send.
+var textsend = framework.Function1{
+	Name:       "textsend",
+	Return:     pgtypes.Bytea,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Text},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		if wrapper, ok := val.(sql.AnyWrapper); ok {
+			var err error
+			val, err = wrapper.UnwrapAny(ctx)
+			if err != nil {
+				return nil, err
+			}
+			if val == nil {
+				return nil, nil
+			}
+		}
+		writer := utils.NewWireWriter()
+		writer.WriteString(val.(string))
+		return writer.BufferData(), nil
+	},
+}
+
+// bttextcmp represents the PostgreSQL function of text type compare.
+var bttextcmp = framework.Function2{
+	Name:       "bttextcmp",
+	Return:     pgtypes.Int32,
+	Parameters: [2]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Text},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1, val2 any) (any, error) {
+		ab := val1.(string)
+		bb := val2.(string)
+		if ab == bb {
+			return int32(0), nil
+		} else if ab < bb {
+			return int32(-1), nil
+		} else {
+			return int32(1), nil
+		}
+	},
+}
+
+// bttextnamecmp represents the PostgreSQL function of text type compare with name.
+var bttextnamecmp = framework.Function2{
+	Name:       "bttextnamecmp",
+	Return:     pgtypes.Int32,
+	Parameters: [2]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Text},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1, val2 any) (any, error) {
+		ab := val1.(string)
+		bb := val2.(string)
+		if ab == bb {
+			return int32(0), nil
+		} else if ab < bb {
+			return int32(-1), nil
+		} else {
+			return int32(1), nil
+		}
+	},
+}